Codechange: Move command callback declarations to the cmd header files.

src/script/CMakeLists.txt

@@ -5,6 +5,7 @@ if(OPTION_TOOLS_ONLY)
 endif()
 
 add_files(
+    script_cmd.h
     script_config.cpp
     script_config.hpp
     script_fatalerror.hpp

src/script/script_cmd.h

@@ -0,0 +1,18 @@
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+ * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file script_cmd.h Command definitions related to scripts. */
+
+#ifndef SCRIPT_CMD_H
+#define SCRIPT_CMD_H
+
+#include "../command_type.h"
+
+CommandCallback CcAI;
+CommandCallback CcGame;
+
+#endif /* SCRIPT_CMD_H */